Constant BASELINE_BATCHM_MAX 

pub const BASELINE_BATCHM_MAX: u32 = DENSE_GEMV_BATCHM_DECODE_MAX_M; // 8u32

2026-09-25: The head band a target without a [defaults] table gets. build_defaults::baseline (crates/kernels/build_defaults.rs) repeats it as a literal. target_defaults_tests::the_baseline_band_is_the_frozen_one checks this constant against DENSE_GEMV_BATCHM_DECODE_MAX_M and the test file’s copy of the gb10 declaration; gb10_declares_the_baseline_apart_from_the_measured_w8a8_ceiling (crates/kernels/tests/target_defaults.rs) checks the real gb10 declaration against the literal.